<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>俄罗斯方块</title>
</head>
<style>
  #root {
    display: flex;
    justify-content: center;
    margin-top: 20px;
  }

  #mark {
    position: absolute;
    z-index: 999;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, .3);
    display: none;
    align-items: center;
    justify-content: center;
    color: #f20;
  }

  #mark p {
    border: 2px solid #eee;
    padding: 7px;
    background-color: #f20;
    color: #fff;
  }

  #panel {
    margin-right: 20px;
    background: #000;
    position: relative;
  }

  #next {
    position: relative;
  }

  #score {
    color: #f20;
    font-size: 2em;
    font-weight: bolder;
    text-align: center;
    margin-bottom: 20px;
  }
</style>

<body>
  <div id="root">
    <div id="panel">
      <div id="mark"><p>游戏暂停</p></div>
    </div>
    <div id="right">
      <div id="next"></div>
      <div id="score"></div>
      <div>
        <p>⬆️：旋转</p>
        <p>⬇️：向下</p>
        <p>⬅️：向左移动</p>
        <p>➡️：向右移动</p>
        <p>空格：暂停/恢复/重新开始</p>
      </div>
    </div>
  </div>
</body>

</html>